Device and process for measuring the mutual orientation of hollow cylinder and an assigned cut edge

Abstract

A method and apparatus for measuring the mutual orientation of an optionally oriented hollow cylinder and a cut end of a body containing the hollow cylinder by employing a high-precision laser gyroscope. In using this method, the orientation measurements can be obtained in a more economical and time efficient manner than those employed using conventional methods. The method involves first placing a laser gyroscope on the inside wall of a hollow cylinder and electronically registering the three-dimensional orientation of said laser gyroscope according to at least two angular coordinates relative to a laboratory system; storing the three-dimensional orientation as a first measurement result; placing the laser gyroscope directly on the cut end, or indirectly on the cut end by resting it on a support mechanism that rests on the cut end; electronically registering the three-dimensional orientation of said laser gyroscope according to at least two angular coordinates relative to a laboratory system; storing the three-dimensional orientation as a second measurement result; comparing said first and second measurement results to obtain a value of a phase displacement angle; and displaying the value of the determined phase displacement angle. The device is especially suited for checking the orientation of cylinder heads and cylinder bore axes of large-volume diesel engines.

What is claimed is:  
     
       1. A process for measuring the mutual orientation of a hollow cylinder and a cut end of a body in which the hollow cylinder is formed, said process comprising the steps of: 
       placing a laser gyroscope on an inner wall of a hollow cylinder;  
       electronically registering the three-dimensional orientation of said laser gyroscope according to at least two angular coordinates relative to a laboratory system;  
       storing said three-dimensional orientation as a first measurement result;  
       supporting said laser gyroscope on said cut end;  
       electronically registering the three-dimensional orientation of said laser gyroscope on said cut end according to at least two angular coordinates relative to a laboratory system;  
       storing said three-dimensional orientation as a second measurement result;  
       comparing said first and second measurement results to obtain a value of a phase displacement angle; and  
       displaying said value of said determined phase displacement angle.  
     
     
       2. The process as claimed in  claim 1 , wherein said step of supporting said laser gyroscope on said cut end comprises placing said laser gyroscope directly on said cut end. 
     
     
       3. The process as claimed in  claim 1 , wherein said step of placing said laser gyroscope on a wall of a hollow cylinder placing comprises placing said laser gyroscope on an inside wall of the hollow cylinder. 
     
     
       4. The process as claimed in  claim 1 , wherein said laser gyroscope is provided with measurement blades, said measurement blades being used for contacting at least one of said inside surface of the hollow cylinder and a planar end surface of said cut end of the body during said electronically registering steps. 
     
     
       5. The process as claimed in  claim 1 , wherein said step of supporting said laser gyroscope on said cut end comprises the steps of placing a support for supporting said laser gyroscope on the end surface of said cut end and placing said laser gyroscope on said support. 
     
     
       6. The process as claimed in  claim 1 , wherein said step of placing the laser gyroscope on the inner wall of the hollow cylinder is repeated at different points around the circumference of the inner wall for increasing the accuracy of the first measurement result. 
     
     
       7. A device for measuring the mutual orientation of a hollow cylinder and a planar cut end of a body containing said hollow cylinder, said device comprising: 
       a high-precision laser gyroscope having means for contacting an inner surface of a said hollow cylinder and for mounting the laser gyroscope on an end surface of said cut end.  
     
     
       8. The device as claimed in  claim 7 , wherein a support mechanism is provided for supporting said laser gyroscope indirectly on said the end surface of said cut end. 
     
     
       9. The device as claimed in  claim 7 , wherein said device further comprises means for measuring directional characteristics of cylinders in large-volume internal combustion engines. 
     
     
       10. The device as claimed in  claim 7 , wherein said laser gyroscope is provided with measurement blades for contacting at least one of said inside surface of the hollow cylinder and a surface of said planar cut end of said body.